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Modification of the surface properties of carbon fibers via the catalytic growth of carbon nanofibers

Published online by Cambridge University Press:  03 March 2011

W.B. Down  and
R.T.K. Baker
W.B. Down
Affiliation:
Catalytic Materials Center, Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802
R.T.K. Baker*
Affiliation:
Catalytic Materials Center, Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802
*
a)Author to whom all correspondence should be addressed.
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Abstract

The surface of commercial pitch and PAN-based carbon fibers has been modified by coating the structures with catalytically formed carbon nanofibers. Reaction conditions have been established that enable one to achieve optimum coverage by the secondary nanostructures without inducing any degradation in the mechanical properties of the parent fibers. Using this approach it is possible to produce a dramatic increase in the surface area of the fibrous structure from a nominal value of about 1.0 m2/g (untreated condition) up to between 250 and 300 m2/g (complete nanofiber coverage). This process results in a significant enhancement in the adhesion properties at the interface between the fiber and matrix components in a composite material. Mechanical tests performed on single uncoated and coated T300 carbon fibers demonstrated that it was possible to obtain an improvement of over 4.75 times in the interfacial shear strength of the fibers following deposition of a critical amount of nanofibers.

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Articles
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Journal of Materials Research , Volume 10 , Issue 3 , March 1995 , pp. 625 - 633
Copyright
Copyright © Materials Research Society 1995

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